By Albert G. edited by Ingalls
Hardcover. 510 pages writer: medical American Inc. 1976 Product Dimensions: 7.7 x 5.9 x 1.1 inches publication Weight: 1 pound 12 oz
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Extra info for Amateur Telescope Making: Book One
Note that the deﬁnition of the deterministic factor of safety is given by f¯ r /f¯ d . Having determined the mean and standard deviation of the margin of safety, the probability of failure can be calculated from the properties of the normal distribution. 67 standard deviations. 12(b), where the margin of safety distribution is represented by (z), the probability of failure is 5%. Note that the margin of safety concept discussed in this section can only be used where the resisting and displacing forces are independent variables.
2 Mechanism of joint formation All the rocks observed in outcrops and excavations have undergone a long history of modiﬁcation over a time of hundreds of millions, or even billions of years. 2). Throughout this sequence, the rock may also be subject to deformation comprising folding and faulting. These processes usually result in the stresses in the rock exceeding its strength a number of times, causing the rock to fracture and form joints and faults. In sedimentary rock, bedding planes that are coincident with breaks in the continuity of sedimentation will also form.
5, the dip/dip direction system facilitates ﬁeld mapping, plotting stereonets, and analysis of discontinuity orientation data. Strike, which is an alternative means of deﬁning the orientation of a plane, is the trace of the intersection of an inclined plane with a horizontal reference plane. 4(b) where the plane has a strike of N45E and a dip of 50SE. In terms of dip and dip direction, the orientation of the plane is 50/135, which is considered to be a simpler nomenclature that also facilitates the use of stereographic analysis.
Amateur Telescope Making: Book One by Albert G. edited by Ingalls